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Port 4323ArcLink/XT

Lincoln Electric's ArcLink/XT is a communication protocol used primarily in industrial environments to facilitate data exchange between welding equipment and control systems. Designed to optimize manufacturing workflows, this protocol leverages UDP transport to ensure low-latency and real-time communication needed for precision welding operations..

inNetwork ServicesIoT
transport
udp

single transport

in transit
cleartext

payload readable on path

assignment
unofficial

used by convention

risk
4/10

caution

lookups
8,796

rank 570 of 993 · top 57%

Technical Details

what runs on :4323

ArcLink/XT is an industrial communication protocol developed by Lincoln Electric to enhance weld automation and data collection for their welding systems. It operates over UDP on port 4323 to offer lightweight and fast message delivery—ideal for the real-time requirements of industrial manufacturing environments. The protocol enables coordination among welding power supplies, robotic controllers, and supervisory control systems, allowing for synchronized operation and centralized management.

Because ArcLink/XT is designed for proprietary equipment, its protocol specification is tailored specifically towards supporting Lincoln Electric’s extensive feature set, including waveform control, job management, and parameter monitoring. This dedicated focus provides optimized performance but limits interoperability with non-Lincoln devices unless special integration is developed.

Its UDP-based transport model makes it well-suited for time-sensitive operations because of lower transmission overhead, albeit at the cost of not guaranteeing delivery or packet order. This means reliability is typically managed at the application level, often through repeated transmissions or acknowledgments within the proprietary software stack.

Security Information

exposure of :4323

risk score

4/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

network services averages 3.9 across 604 ports — this one sits 0.1 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

unofficial

used by convention, not registered — what answers here varies by deployment

reachable over

udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

Common vulnerabilities related to UDP-based industrial protocols such as ArcLink/XT include:

  • Lack of Encryption: By default communication is unencrypted, exposing sensitive operational data to interception.
  • Spoofing and Injection: Without strong authentication, malicious actors could spoof legitimate devices or inject unauthorized commands.
  • Denial of Service (DoS): The reliance on UDP opens pathways to flooding attacks that may disrupt equipment communication or overburden controllers.

Mitigations involve:

  • Network Segmentation: Place all welding and control systems on an isolated VLAN or industrial DMZ to limit exposure.
  • Perimeter Controls: Use firewalls and access control lists to restrict which systems can reach port 4323.
  • Encryption and Authentication: Implement VPNs or secure tunnels if remote access is required, and layer authentication logic within the application.
  • Monitoring and Logging: Continuously analyze network activity on important industrial systems for signs of abnormal traffic patterns or repeated error conditions that may indicate attack attempts.

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risk mix of the 8 listed

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0 of 8 encrypted